The CHD806DM4-E controls four separate doors, can be connected to four outdoor standard Wiegand readers, and saves 32,000 user cards and 32,768 entry records, even offline. Communication rate is 1,200 bits to 115,200 bits per second. Besides TCP/IP and 10 M Ethernet, it also supports standby interfaces, such as standard RS232, RS485, RS422 and SMS. Working temperature is -10 degrees Celsius to 55 degrees Celsius. Working humidity is 98 percent. Surface oil treatment ensures mold-proofing and anti-dampness. Power supply is 220 volts 50 HZ ??nating current or 12 volts DC with a power consumption of less than one watt.